The challenge of iOS in the home

iOS everywhere, including in the home, has been a logical area of future product speculation ever since Apple announced iOS in the Car in 2013 and launched it as CarPlay in 2014. A bi-directional version of Apple's TV-centric AirPlay, if Apple could project iOS onto a car display, why not a camera display? Why not every display? Conversely, if apps were using the iPhone and iPad as controls, why not make that experience even better? That's what the latest Apple home automation rumors focus on. But would it work?